Effects of Steel Fiber and Specimen Geometric Dimensions on the Mechanical Properties of Ultra-High-Performance Concrete
Open accessAbstract
Ultra-high-performance concrete (UHPC) is an advanced concrete with superior mechanical strength, ductility and durability properties. However, the influence of steel fiber on its constitutive laws and the specimen geometric dimension effect on its strength had not been paid enough attention. To investigate the effect of steel fibers on the properties of UHPC, specimens with different fiber volume contents and fiber types were tested. Meanwhile, the mechanical properties of UHPC at different ages from 3 days to 28 days were conducted. Moreover, specimens with various geometric dimensions were also prepared to study the effect of specimen geometric dimensions (dog-bone-shaped, prism and cylinder specimens) on the properties of UHPC. The results indicated that elastic modulus, tensile peak stress and the corresponding strain increased as the fiber volume content and curing age increased. Specimens with hooked-end fibers exhibited better tensile performance than those with straight fibers. Furthermore, different geometric dimensions of specimens significantly influenced the tensile properties of UHPC. Based on the experimental results, conversion factors were suggested for the transformation of strength obtained from specimens with different geometric dimensions to reference specimens. In addition, both compressive and tensile constitutive laws were proposed to generate the stress–strain relationship of UHPC.
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The use of steel fibers in UHPC-filled steel tube members can significantly improve the ductility, compressive ultimate bearing capacity, and flexural ultimate bearing capacity of these members.
“The use of steel fibers in UHPC-filled steel tube (UHPC-FST) members can significantly improve the ductility, as well as compressive and flexural ultimate bearing capacity, of these members [19,20,21,22,23].”
From Bond-Slip Performances of Ultra-High Performance Concrete Steel Tube Columns Made of a Large-Diameter Steel Tube with Internally Welded Steel Bars (2023) · cites this paper as [22]
The Introduction says steel fibers can change brittle UHPC failure to ductile failure, and the Conclusions report improved compressive properties with increasing fiber content. But the paper tests UHPC specimens, not UHPC-filled steel tube members, and does not establish improved compressive or flexural ultimate bearing capacity for those members. (LLM, conf=0.87)
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Cited by
Sorted by citations
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- Authors
- Fang, H., Gu, M., Zhang, S., Jiang, H., Fang, Z., & Hu, J.
- Affiliations
- Guangdong University of Technology (CN)
- Guangzhou Communication Design Institute Co., Ltd., Guangzhou 511400, China
- Michigan State University (US)
- Corresponding author
- Jiang, Haibo
- Venue
- Materials
- Publisher
- MDPI AG
- Published
- 2022-04-21
- Volume
- 15
- Issue
- 9
- Pages
- 3027
- ISSN
- 1996-1944 (ISSN-L)
- PMC
- PMC9100362
- OpenAlex
- W4224321004
- Cited by
- 48
- References
- 30
- Citations by year
- 2026: 14 · 2025: 14 · 2024: 10 · 2023: 7 · 2022: 3
- FWCI
- 3.82
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Materials (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (51778150)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Innovative concrete reinforcement materials
- Physical Sciences › Engineering › Building and Construction › Structural Behavior of Reinforced Concrete
- Physical Sciences › Engineering › Civil and Structural Engineering › Fire effects on concrete materials
- Keywords
- ultra-high performance concrete, steel fibers, fiber volume content, hooked-end steel fibers, specimen geometry, dog-bone specimens, stress-strain behavior, constitutive equations, elastic modulus, tensile strength, compressive strength, curing time
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